/*
 *   Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 *   Licensed under the Apache License, Version 2.0 (the "License").
 *   You may not use this file except in compliance with the License.
 *   A copy of the License is located at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 *   or in the "license" file accompanying this file. This file is distributed
 *   on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 *   express or implied. See the License for the specific language governing
 *   permissions and limitations under the License.
 */

package com.amazon.opendistroforelasticsearch.sql.expression.function;

import java.io.Serializable;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.RequiredArgsConstructor;

/**
 * The definition of Function Name.
 */
@EqualsAndHashCode
@RequiredArgsConstructor
public class FunctionName implements Serializable {
  @Getter
  private final String functionName;

  public static FunctionName of(String functionName) {
    return new FunctionName(functionName.toLowerCase());
  }

  @Override
  public String toString() {
    return functionName;
  }
}
